President Trump has said China has reached out to negotiate a deal. Another official said the administration has already been working on supply chain issues for some time in anticipation of the imposition of the tariffs.

China is facing a double whammy: corrosive deflation and tariffs that threaten to block trade. Chinese workers will be the biggest casualties.

The White House said Tuesday that "the ball is in China's court," as far as a trade deal with the U.S. is concerned. Meanwhile, China is t